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Electric Traction

Electric Traction
If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails?

0.35
0.26
0.16
0.46

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Electric Traction
Which of the following drives is suitable for mines where explosive gas exists?

Diesel engine
Battery locomotive
Steam engine
All of the listed here

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Electric Traction
The friction at the track is proportional to

None of the listed here
Speed
1/(speed)²
1/speed

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Electric Traction
The value of coefficient of adhesion will be high when rails are

Wet
Greased
Cleaned with sand
Sprayed with oil

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Electric Traction
________ have maximum unbalanced forces.

Steam locomotives
All of the listed here
Diesel locomotives
Electric locomotives

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Electric Traction
The horsepower of steam locomotives is

2500 to 3000
1500 to 2000
500 to 1000
Up to 1500

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